MongoDB Node.js Driver up to 7.7.x DNS SRV Host Discovery redirect

Summaryinfo

A vulnerability has been found in MongoDB Node.js Driver up to 7.7.x and classified as problematic. Affected by this vulnerability is an unknown functionality of the component DNS SRV Host Discovery. Performing a manipulation results in redirect. This vulnerability is known as CVE-2026-126837. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in MongoDB Node.js Driver up to 7.7.x. It has been classified as problematic. This affects an unknown part of the component DNS SRV Host Discovery. The manipulation with an unknown input leads to a redirect vulnerability. CWE is classifying the issue as CWE-601. The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. This is going to have an impact on integrity. The summary by CVE is:

A validation flaw in the DNS SRV host discovery of the MongoDB Node.js driver may cause the driver to connect to a host outside the expected domain. For a mongodb+srv:// connection string, the driver checks each host name in the DNS SRV response against the domain of the connection string. The driver then builds the connection address from the original name, in which certain characters end the host name early. An unauthenticated party who can forge or change the DNS SRV response may redirect the connection to a host of their choice. TLS does not prevent this, because the driver verifies the server certificate against the redirected host name. This may result in unintended disclosure of application data and authentication credentials, and in altered query results. Applications that use mongodb:// connection strings are not affected.

The advisory is shared at jira.mongodb.org. This vulnerability is uniquely identified as CVE-2026-126837 since 11/11/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1204.001 for this issue.

Upgrading to version 7.8.0 eliminates this vulnerability.

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Productinfo

Type

• JavaScript Library

Vendor

• MongoDB

Name

• Node.js Driver

Version

• 7.0
• 7.1
• 7.2
• 7.3
• 7.4
• 7.5
• 7.6
• 7.7

License

• open-source

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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